Spell Opportunity

(Epic Level Handbook, page 67, DnD 3.0)

[Epic]

You can cast a touch spell as an attack of opportunity.

Prerequisite

Combat Casting, Combat Reflexes, Quicken Spell, Spellcraft 25 ranks

Benefit

Whenever you are allowed an attack of opportunity, you may cast (and attack with) a touch spell as your attack of opportunity. This incurs attacks of opportunity just as if you had cast the spell normally.

Normal

Without this feat, you can only make a melee attack as an attack of opportunity